I would look into sourcing the diff drop off a rough country fj 6" lift or the fabtech 6 incher for the fj. I'd bet that's about the closest you can get. There's a chance it might even bolt right up. Once I get enough money for a new set of tires, then I'll be saving for that RC kit. If you haven't got it figured out by then, I'll let you know how it goes.